{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111466668",
    "entityType": "Track",
    "nonce": "0x45ba386488d56956b41e19a1266a98ab8135f54518b41f390270aba1ab245ff9",
    "signature": "0x97677209a4c67aa2590c7d8c94447c1406a84c832a594a3f288c9db4d46f2d1c39b0756ea4806a837775be30888dfbab813ff93f43ed2c7d4e77645e03cf2c501c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}